Exhaust-silencer for explosion-motors.



P. FEHDE. EXHAUST SILENGBB, FOR EXLOSION MOTORS.

APPLICATION FILED JULY 5, 1911.

Patented Nov. 12, 1912.

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. BEST AVAILABLE COP P .FEHDLl EXHAUST SILBNCER 'FOR EXPLOSION MOTORS.

l APPLICATION FILED JULY 5. 19 11.

1,044,157. Patented N0v.12,1912.

. Y 2s1EBTs'-SHBBT z.

To al? whom it may concern:

'Bm-pire, physician,

rapidly expanding and lllll UNITED 4'sT PAUL renna, or BERLIN, GERMANY.

vEX&1ATJ'S'J.SILENCER.. FOR EXPLOSION-MOTORS.

Specification ot Letters Patent.' i Y 'Patented NOV. 12, 1912.

Application filed iuly 5, 191i. Serial No. 636,860. i l

Be it known that, I, PAUL Ferron, a subject of the King of Prussia, and a resident of 70c Schnhauser Allee, Berlin, German have invented an 'im` proved Exhaust-Silencerl for Explosion-` This invention relates toan improved ex haust silencer' :torexplosion motors and also comprises means whereby the unburned ex` haustgases may be consumed before pass' ing into the atmosphere.

The noisev ensuing from exhaust is caused by -air `filling thev more or less evacuated space resulting fr 'm the rapid vand free exit.

of the gases trom the exhaust pipe, an evacuated space being formed after each exhaust in the exhaust pipe or at the out-let ot the latter owing to the the exhaust gases issue'. Owing to the rapid expansion and cooling of the exhaust gases 'inthe atmosphere water is condensed there from and-the gases vissuein the form ot a bluish white vapor having a very unpleasant odor.

According to this invention the exhaust gases alter their exit troni theexhaust pipe are constrained to make a -circuitouspath and to return and flow past the. outlet of the exhaust pipe, the gasesbeing capable of cooling without the intervention ot baille plates .or like obstructions and the oil vapor and steam beingthereby condensed while thereturnolf the gases or the admission of air into-the vacutorm'ed' at the outlet olf the exhaust pipe is prevented owing to the velocity at whichthe gases returning thereto flow past the outlet end of the exhaust pipe. The gases'tinally issue in a perfectly cold state unvaporized and tree trom odor. The gases issuing from the exhaust pipe are caused to return and `flow pastthe outlet end of the exhaustpipes by the pressure ot the next succeeding exhaust. f In order to eilect a complete combustion of the exhaust gases. l provide means whereby the latter. after returning to the outlet end of the exhaust pipe are caused to ignite before passing into theatmosphere.

ln order that the invention may be more clearly .und-enfitood reference' isfinade tothe accoi'npanyinl;L lrawings which show by way of example v lrious methods ofcarrying out my inventiongl Figure (1 is' a sect.ional elevation showing high velocity atl which' one construction ol my improved apparatus.

Fig. 2 is a similar view to Fig. l'showing a slightlyv modified 'form of the same.' Fig.`

3 is a detail view ol the valves diagrammatically illustrated in Fig.' 2., tional elevation oit a' still further modified form of apparatus.

referring to Eig. l of ther drawings/,z

Ais the exhaust pipe which isinserted to a `certain depth somewhat as shown into the open end :c of a circuitous conduit I) which is of larger diameter than the nozzle d' of the exhaust pipe a'. the circuitous conduit .b opens just abovethe inlet end a break 0 being Jformed ybetween the inletand outlet ends and m respectively. l On the first exhaust of gasesl from the rpipe a the air-cushion in the pipe b'is set in rapid motion or driven out before the exhaust gases so that the air and gases issue from the pipe Y). at m at such a velocity that they cannot return into the vacuumv` formed at or withinthe nozzle d after the first exhaust and the noise caused by exhaust is thereby obviated. vPart of the/air and gases issuing at ml pass 'into the outer atmosphere at returning into As the gases issuing from the exhaustpipe @attain a velocity ot about 800 meters per second, a current is created in thereturn conduit b of1about 200 meters per second according to the relative diameters,-

of the return conduit o and exhaust nozzle nl and owing to the high velocity therefore at which the gases issue from the conduit .7) at m there is no possibility ct the s ame returning into the exhaust .pipe a.

lt is preterablelo form the open. ends of the conduit o of tunnel shape asshown. It will be seen thatthere are three currents at the nozzle Lg viz. the' inner exhaust gases issuing from the nozzle el, the air and gases issuing from' the outlet end and surrounding the exhaust gases -from the nozzle d and the gases escaping at 0 and as the flow oftl- Agases is not limited in any Way, the possi bility ot' the formation ot heatv by Contact with obstructions is obviated.

The gases can of course be allowed .to escape at any pointy inthe length of the `return conduit Z) through slots, openings or the like, and instead ot the inlet and outlet ends zu and m of the return conduit 7o entirely o, the remainder of the gases the tube o past the nozzle d.l

surrounding the nozzleb they may only partly surround the same or open in proximity thereto.

A slight modification of the invention is shown in lfig. 2 in which means are Tro- Yided for enabling the exhaust gases to be burned before passing into the atmosphere. For this. purpose return valves e are provided in the return pipe b, the return valve being adapted to open inwardly against the action tif a spring, as shown in detail in F 3. Air may thus be admitted to the exhaust gases in the conduit intimately mixing with the saine and passing by the nozzle l where the mixture ot air and exhaustl gases is ignited by the hot exhaust gases issuing trom the nozzle d. Any other suitable form of air admission may be provided or admitting air into the return-conduit I).

A still further modified form of apparatus is illustrated in F ig. 4. In this case the exhaust pipe d forks into a short pipe d2 and into a return conduit 153 which may be provided with air-inlet valves e. The return pipe d3 open into a chamber Z5 surrounding the short tube d2, the chamber di opening into a pipe a provided with an exhaustnozzle (Z opening into a return pipe b of similar construction to that shown in Fig. 2. In this arrangement part of the exhaust gases from the pipe d pass by way of the pipe d2 into the chamber (Z5 while the remainder of the gases pass along the conduit (Z3 mixing with air admitted thereto by way of the valves e and issuing from the return pipe d3 at d* surrounding the short tube d2, where the mixture of air and gases is ignited in the chamber di' by the hot exhaust gases issuing .troui'the pipe (l2 and the consumed exhaust gases and air then pass by way of the pipe fz to the nozzle (Z, where means are provided for silencing the exhaust in the same manner as shown in Fig.

l. l'n combination with the exhaust pipe of an explosion motor, a ciruitous pipe of substantially uniform cross-Section and open only at its ends, said pipe ends being arranged in alinemeiit with andin proximity to each other but forming a gap between them', the outlet end of said exhaust pipe opening into the inlet end of said circuitous 1:ipe while the outlet end of said eircuitous pipe opens. somewhat in the rear ol" the outlet end of said exhaust pipe.A

2. Incombination with the exhaust pipe -of an explosion motor, a eircuitous pipe ol substantially uniform cross-section and open only at its ends, said pipe ends being flared outwardly and arranged in aliuement with V and in proximity to each other but formingT a gap between them, and the outlet end of said exhaust pipe opening into the inlet end of said circuitous pipe while the outlet end of said circuitous pipe opens somewhat in the rear of the outlet end of said exhaust pipe.

3. In combination with the exhaust pipe of an explosion motor, a circiiitous pipe of substantially uniform cross-section and open only at its ends, said pipe ends being arranged ln alinement with and in proximity to each othe" but forming a gap between them, and the outlet end of said exhaust pipe opening into the inlet end of said circuiteus pipe`while the outlet end of said circuitous pipe opens somewhat in the rear of the outlet end of said exhaust pipe and inwardly-opening check valves in the wall' of said circuitous pipe for enabling the ad-4 mission of air thereto.

et. An exhaust silencer for explosion motors and means for consuming the exhaust gases comprising, in combination, a circuitous pipe forming a continuation of the exhaust pipe, means for admitting air to said circuitous pipe, a branch pipe from said exhaust pipe, the outlet end of said circuitous pipe surrounding said branch pipe, a chamber into which said circuitous pipe and branch'pipe open, a secondary exhaust pipe connected to said chamber, and a second circuitous pipe into whose inlet end said secondary exhaust pipe opens, the outlet end of said second circuitous pipe surrounding the outlet end of said secondary exhaust pipe in proximity to the outer end of the latter.

5. An exhaust silencer for explosion motors and means for consuming the exhaust gases comprising, in combination, a circuitous pipe forming a lcontinuation of the exhaust pipe, means for admitting air to said circuitous pipe, a branch pipe from said exhaust pipe, the outlet end of said circuitous pipe surrounding said branch pipe, a cham, ber into which said circuit'ous pipe and branch pipe open, a secondary exhaust pipe connected to said chamber, and a second circuitous pipe into Whose inlet end said secondary exhaust pipe opens, the outlet end of said second circuitous pipe surrounding the outlet end of said secondaryexhaust pipe in proximity to the outer end of the latter, the inlet and outlet ends of said second circuitous pipe being in axial aliiieiiient and tunnelshaped.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

PAUL FEllDE.

Witnesses:

' HENRY HAsenii,

VOLDEMAR HAUPT. 

